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<a name="GtkEventBox"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="GtkEventBox.top_of_page"></a>GtkEventBox</span></h2>
<p>GtkEventBox — A widget used to catch events for widgets which
do not have their own window</p>
</td>
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<div class="refsect1">
<a name="GtkEventBox.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
</td>
<td class="function_name">
<a class="link" href="GtkEventBox.html#gtk-event-box-new" title="gtk_event_box_new ()">gtk_event_box_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkEventBox.html#gtk-event-box-set-above-child" title="gtk_event_box_set_above_child ()">gtk_event_box_set_above_child</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GtkEventBox.html#gtk-event-box-get-above-child" title="gtk_event_box_get_above_child ()">gtk_event_box_get_above_child</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkEventBox.html#gtk-event-box-set-visible-window" title="gtk_event_box_set_visible_window ()">gtk_event_box_set_visible_window</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GtkEventBox.html#gtk-event-box-get-visible-window" title="gtk_event_box_get_visible_window ()">gtk_event_box_get_visible_window</a> <span class="c_punctuation">()</span>
</td>
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</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkEventBox.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="GtkEventBox.html#GtkEventBox--above-child" title="The “above-child” property">above-child</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="GtkEventBox.html#GtkEventBox--visible-window" title="The “visible-window” property">visible-window</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkEventBox.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GtkEventBox.html#GtkEventBox-struct" title="struct GtkEventBox">GtkEventBox</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GtkEventBox.html#GtkEventBoxClass" title="struct GtkEventBoxClass">GtkEventBoxClass</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkEventBox.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GInitiallyUnowned
        <span class="lineart">╰──</span> <a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>
            <span class="lineart">╰──</span> <a class="link" href="GtkContainer.html" title="GtkContainer">GtkContainer</a>
                <span class="lineart">╰──</span> <a class="link" href="GtkBin.html" title="GtkBin">GtkBin</a>
                    <span class="lineart">╰──</span> GtkEventBox
</pre>
</div>
<div class="refsect1">
<a name="GtkEventBox.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GtkEventBox implements
 AtkImplementorIface and  <a class="link" href="GtkBuildable.html" title="GtkBuildable">GtkBuildable</a>.</p>
</div>
<div class="refsect1">
<a name="GtkEventBox.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gtk/gtk.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GtkEventBox.description"></a><h2>Description</h2>
<p>The <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a> widget is a subclass of <a class="link" href="GtkBin.html" title="GtkBin"><span class="type">GtkBin</span></a> which also has its
own window. It is useful since it allows you to catch events for widgets
which do not have their own window.</p>
</div>
<div class="refsect1">
<a name="GtkEventBox.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gtk-event-box-new"></a><h3>gtk_event_box_new ()</h3>
<pre class="programlisting"><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
gtk_event_box_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Creates a new <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a>.</p>
<div class="refsect3">
<a name="gtk-event-box-new.returns"></a><h4>Returns</h4>
<p> a new <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-event-box-set-above-child"></a><h3>gtk_event_box_set_above_child ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_event_box_set_above_child (<em class="parameter"><code><a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a> *event_box</code></em>,
                               <em class="parameter"><code><span class="type">gboolean</span> above_child</code></em>);</pre>
<p>Set whether the event box window is positioned above the windows
of its child, as opposed to below it. If the window is above, all
events inside the event box will go to the event box. If the window
is below, events in windows of child widgets will first got to that
widget, and then to its parents.</p>
<p>The default is to keep the window below the child.</p>
<div class="refsect3">
<a name="gtk-event-box-set-above-child.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>event_box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>above_child</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> if the event box window is above its child</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-event-box-get-above-child"></a><h3>gtk_event_box_get_above_child ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_event_box_get_above_child (<em class="parameter"><code><a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a> *event_box</code></em>);</pre>
<p>Returns whether the event box window is above or below the
windows of its child. See <a class="link" href="GtkEventBox.html#gtk-event-box-set-above-child" title="gtk_event_box_set_above_child ()"><code class="function">gtk_event_box_set_above_child()</code></a>
for details.</p>
<div class="refsect3">
<a name="gtk-event-box-get-above-child.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>event_box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-event-box-get-above-child.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the event box window is above the
window of its child</p>
</div>
<p class="since">Since: 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-event-box-set-visible-window"></a><h3>gtk_event_box_set_visible_window ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_event_box_set_visible_window (<em class="parameter"><code><a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a> *event_box</code></em>,
                                  <em class="parameter"><code><span class="type">gboolean</span> visible_window</code></em>);</pre>
<p>Set whether the event box uses a visible or invisible child
window. The default is to use visible windows.</p>
<p>In an invisible window event box, the window that the
event box creates is a <code class="literal">GDK_INPUT_ONLY</code> window, which
means that it is invisible and only serves to receive
events.</p>
<p>A visible window event box creates a visible (<code class="literal">GDK_INPUT_OUTPUT</code>)
window that acts as the parent window for all the widgets
contained in the event box.</p>
<p>You should generally make your event box invisible if
you just want to trap events. Creating a visible window
may cause artifacts that are visible to the user, especially
if the user is using a theme with gradients or pixmaps.</p>
<p>The main reason to create a non input-only event box is if
you want to set the background to a different color or
draw on it.</p>
<p>There is one unexpected issue for an invisible event box that has its
window below the child. (See <a class="link" href="GtkEventBox.html#gtk-event-box-set-above-child" title="gtk_event_box_set_above_child ()"><code class="function">gtk_event_box_set_above_child()</code></a>.)
Since the input-only window is not an ancestor window of any windows
that descendent widgets of the event box create, events on these
windows aren’t propagated up by the windowing system, but only by GTK+.
The practical effect of this is if an event isn’t in the event
mask for the descendant window (see <a class="link" href="GtkWidget.html#gtk-widget-add-events" title="gtk_widget_add_events ()"><code class="function">gtk_widget_add_events()</code></a>),
it won’t be received by the event box.</p>
<p>This problem doesn’t occur for visible event boxes, because in
that case, the event box window is actually the ancestor of the
descendant windows, not just at the same place on the screen.</p>
<div class="refsect3">
<a name="gtk-event-box-set-visible-window.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>event_box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>visible_window</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> to make the event box have a visible window</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 2.4</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-event-box-get-visible-window"></a><h3>gtk_event_box_get_visible_window ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_event_box_get_visible_window (<em class="parameter"><code><a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a> *event_box</code></em>);</pre>
<p>Returns whether the event box has a visible window.
See <a class="link" href="GtkEventBox.html#gtk-event-box-set-visible-window" title="gtk_event_box_set_visible_window ()"><code class="function">gtk_event_box_set_visible_window()</code></a> for details.</p>
<div class="refsect3">
<a name="gtk-event-box-get-visible-window.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>event_box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkEventBox.html" title="GtkEventBox"><span class="type">GtkEventBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-event-box-get-visible-window.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the event box window is visible</p>
</div>
<p class="since">Since: 2.4</p>
</div>
</div>
<div class="refsect1">
<a name="GtkEventBox.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GtkEventBox-struct"></a><h3>struct GtkEventBox</h3>
<pre class="programlisting">struct GtkEventBox;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GtkEventBoxClass"></a><h3>struct GtkEventBoxClass</h3>
<pre class="programlisting">struct GtkEventBoxClass {
  GtkBinClass parent_class;
};
</pre>
<div class="refsect3">
<a name="GtkEventBoxClass.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GtkEventBox.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GtkEventBox--above-child"></a><h3>The <code class="literal">“above-child”</code> property</h3>
<pre class="programlisting">  “above-child”              <span class="type">gboolean</span></pre>
<p>Whether the event-trapping window of the eventbox is above the window of the child widget as opposed to below it.</p>
<p>Owner: GtkEventBox</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkEventBox--visible-window"></a><h3>The <code class="literal">“visible-window”</code> property</h3>
<pre class="programlisting">  “visible-window”           <span class="type">gboolean</span></pre>
<p>Whether the event box is visible, as opposed to invisible and only used to trap events.</p>
<p>Owner: GtkEventBox</p>
<p>Flags: Read / Write</p>
<p>Default value: TRUE</p>
</div>
</div>
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